Set the thermal (on the current layer) of pins or vias to the given style.

Style = 0 means no thermal.

Style = 1 has diagonal fingers with sharp edges.

Style = 2 has horizontal and vertical fingers with sharp edges.

Style = 3 is a solid connection to the plane.

Style = 4 has diagonal fingers with rounded edges.

Style = 5 has horizontal and vertical fingers with rounded edges.